It's in the extras-backup folder linked on the README.md. Try ./extras-install.sh. WARNING: Read EXTRAS-README.md.

• C-a Select all
• C-b Special prefix see below
• C-c Copy
• C-S-c ? User command ?. Or C-c ? if there is no text selection. Prefix mode-specific-map. See C-b C-c ? and file packages/c-map.el
  • Only upper and lower case letters are allowed for "user" customizations
• C-f Find. Also forward find again. C-r recusive edit in find. See C-y
• C-n New or open file by name
• C-o Ohm-mega SI units
• C-p List packages
• C-t Start terminal application
• C-q Quit
• C-r Replace
• C-s Save
• C-v Paste
• C-w Beginning of line
• C-x Cut
• C-S-x ? Execute ?. Or C-x ? if there is no text selection. See C-b C-x ?
  • After execute \ behaves as though C-b C-x C-\ was entered
• C-y Exit recursive edit
• C-z Undo
• C-\ Another special prefix custom-escape-map. See file packages/escape-map.el

• M-c Capitalize letter and advance to next word
• M-p Install language grammar
• M-q Like "control Z" background job close
• M-r Run application using rofi as an emacs child process
• M-s Save as
• M-u Mu SI units
• M-v Another special prefix custom-v-map. See file packages/v-map.el
• M-x It's still an Emacs classic. Ever needed to evaluate a LISP symbol? The fun starts here.
• M-<Up/Down> Buffers Up: Previous, Down: Next
• M-S-<Cursor> Windows Up: Close, Down: New Split Below, Left: Next, Right: New Split Right

• C-b Kill buffer
• C-c ? User command ? if text is selected
• C-x ? Execute if text is selected
• \ Use special prefix C-\
• Any difficult to enter terminal control codes C-<key> may map from C-b <key>

• AltGr produces special characters on some national keymaps
• On Chromebooks the Everything key can produce Super sequences S-s-, C-s- and M-s-if the other modifier is pressed first

Maybe I should add extra things to make terminal mode better, but ... and tmux. Also a .bashrc is included.